Image forming apparatus and method of controlling the same

An image forming apparatus configured to form images on both sides of a sheet, comprising:

• an image forming unit configured to form an image on an image bearing member;
• a first conveyer configured to convey the sheet on a conveyance path, and to move the sheet being conveyed toward a width direction, which is orthogonal to a conveyance direction;
• a second conveyer configured to invert and convey, after the formed image is transferred onto a first surface of the sheet, the sheet to transfer an image onto a second surface of the sheet;
• a detector configured to detect a side edge position of the sheet in the width direction during conveyance for the transferring onto the first surface of the sheet, and during conveyance for the transferring onto the second surface of the sheet, respectively;
• and
• a controller configured to determine, based on a detection result from the detector, an image forming position on the image bearing member in the width direction, and to control a storage unit to store a result of the determination,
• wherein, in a case where an image forming position of the image to be formed on the second surface of a previous sheet is stored in the storage unit, the controller determines an image forming position of the image to be formed on the second surface of the sheet based on the stored image forming position, and controls the first conveyer to move the sheet based on the determined image forming position and the detection result from the detector.